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Finding the Fourth Proportional to 485.04, 725.76 and 415.68

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Solution

The fourth proportional to 485.04, 725.76 and 415.68 is: 621.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.04 : 725.76 = 415.68 : x
  2. Step 2: Convert to fraction form
    485.04/725.76 = 415.68/x
  3. Step 3: Cross multiply
    485.04x = 725.76 × 415.68
  4. Step 4: Simplify right side
    485.04x = 301,683.92
  5. Step 5: Solve for x
    x = 301,683.92/485.04
  6. Step 6: Final answer
    x = 621.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.